22127745 has 16 divisors (see below), whose sum is σ = 35472960. Its totient is φ = 11778624.

The previous prime is 22127719. The next prime is 22127747. The reversal of 22127745 is 54772122.

It is not a de Polignac number, because 22127745 - 2⁵ = 22127713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22127747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9066 + ... + 11244.

It is an arithmetic number, because the mean of its divisors is an integer number (2217060).

Almost surely, 2^22127745 is an apocalyptic number.

It is an amenable number.

22127745 is a deficient number, since it is larger than the sum of its proper divisors (13345215).

22127745 is a wasteful number, since it uses less digits than its factorization.

22127745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864.

The product of its digits is 7840, while the sum is 30.

The square root of 22127745 is about 4704.0137117147. The cubic root of 22127745 is about 280.7452299205.

Adding to 22127745 its reverse (54772122), we get a palindrome (76899867).

It can be divided in two parts, 221 and 27745, that added together give a triangular number (27966 = T₂₃₆).

The spelling of 22127745 in words is "twenty-two million, one hundred twenty-seven thousand, seven hundred forty-five".